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Re: 1080i vs 1080p

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john sharafRe: 1080i vs 1080p
by on Feb 7, 2011 at 3:57:33 pm

Teri,

Greg's answer is correct; always use progressive frame rates for media purposed for the web or dvd as the repeated frames (in 24 or 30 fps rates) are much easier for the compression to take place. In practice the compressor has the time period of two (or with 24p on some frames three) frames to do its work vs having to do it 60 times a second with interlace. That's why. As regards dvd's they are always de-interlaced to progressive anyway, this way they are able to fit as much as twice the information in the same space.

JS



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